Gravity-trap dry separator.



D. F. PLATNBR.

GRAVITY TRAP DRY SBPARATOR.

APPLICATION FILED 1111.11.17, 1914.

1,1 31,081. Patented Mar. 9, 1915.

WITNESSES: INVEN'LOR TIE MORRIS PETERS CO., PHOTD-LITHO. WASHINGTUN.Dnc.

.UNITED sT-ATEsPATENT onirica.

DAVID F. PLAINERQOF MONTERDY, CALIFORNIA, AssIeNon 0F ONE-FOURTH 'royERNEST MICHAELIS AND oNE-roURTH Toc. N. TIDDITs,v or MONTEREY, CALI-FQRNIA GRAvITY-TRAP DRY sEPAnAToR.

Specification of Letters Patent. i Patented Blair. 9, 1915.

Appiieation med March 17, 1914. seriaiNo. 825,272'.

T0 att whom it may concern Be it known that I, DAVID F. PLATNER, a

citizen of the United States, residing atl Monterey, in the county ofMonterey and State of California, have invented new land usefulImprovements in Gravity-Trap Dry Separatore, of which theffollowing is aspecification.

-This invention relates to machines for separating gold and othermetalliferous valuesy for crushed ores, gravel and the like,V

by dry process, the special object of the invention being to provide adry-separator and concentrator of this character which is simple,efficient, of large capacity, reversible and adjustable, all as willappear hereinafter.

Thel invention consists of ,the` parts and the construction andcombination of parts as hereinafter more fully described and claimed,having reference to the accompanying drawings, in which-V Figure 1 is alongitudinal section of the Vinvention on the line X-X, Fig. 3. Fig. 2

is a fragmentary Vplan view, with parts broken away. Fig. 3 is anendelevation. Fig. 4 is a sectional view of ariflle. Fig. 5 is a detailof a staple. Y A represents a gravity trap box pivotallymountedcentrally, as at 2, on flexible standards 3 3 secured to a rigidframe or jarring posts 4--4; the box A being adapted to be given anoscillatingor reciprocating lateral movement by suitable means, as alever 5, linked to the standardV 3 at one end and linkedly connected toa crank 6 at the other end. The crank 6 is `rotated in any suitablemanner so as to rock the lever 5 to shake the gravity box A from side toside, and jar it against the jarring posts 4 4. Manifestly any othermeans maybe employed to effect this necessary jar or vibration of thebox.

The Vtop of the box is covered with a screen 7 and an intermediatescreen 8 is disposed thereunder. The bottom of the box is provided witha special form of transversely extending rillles 9 which are con-ystructed and arranged as shown in Figs. 1

and 4. These riles 9 are each composed of a sheet-metal plate bent toform a rectangular trough with a flat bottom and straight` shown at band theportion b having an upwardly projecting vertical lip c. The riiesare disposed on each side of thecenter of ward the center, as shownin'Fig. 1. The lips c terminate a short distance below the lower screenl8. The bottom of the box A, between-,the vriiiieplates 9, is studdedwith the box, 4with the parts b-Gextending tostaples 10, Figs. 2 and 5,which are so staggered and otherwise disposed in `relation to eachotheras to. thoroughly rake the-materials being treated vertically andhorizontally, thus preventing the materials packing between the yrifllesin seams or strata.v

Materialto be treated is fed centrally, at 13, and the box A may betilted andl supported atY any desired angle in either direction on thepivotal bearing 2, being retained in any desired position by suitablemeans, as 1 the adjustable brackets 11, Vvupon. which either end of the'toprmay be supported;

rollers 12 on thebox A being adapted to bear on the brackets or seats11. Thisrarrangement permits of the floor of the box A being inclined atany desired pitchV in either directionand permits the box to be vibratedwhile iny any position. y,By removing i. the bracketsV 11 fromtheirsupport, ythe box A may be inverted when desired, and whenV cleaning.Each end of the box A is .open so pas to allow the lighter' materials organgue which pass'over the riflles 9 to be discharged when the box is ininclined position. The boxV is divided atits .center by a partition 14so that when inclined, only the Y waste material or gangue runningoverthe riles Von the lower half of the box will be allowed to escape; thetrapped material and values on the upper half being confined Vwithin andbetween the riiiles until the box is later inverted in cleaning up. Y

In operation, the material Vto be treated is delivered to theV screen 7in any desired manner, as through a hopper 13, and Von passing throughthe screens 7e-8 is deposited between the riilles 9 and is subjected tojarring action whichV causes the heavier or mineral particles to settleto the bottom of the-.box A, while the lighter material or angue passesover the riflies to be discharge when the box is inclined, as beforeVdescribed, the

values remaining between the upright platesV of the riies 9, to beremoved for further treatment, as desired. y v

The invention is shown in the drawings as a unit,.but it is obvious thata series ofi boxes A. can be mounted side by side, either onone orseparate pivots, and be subjected to jarring Vmotion simultaneously orindependently.

F or this deviceI claim the following spe` tion of the ritfie placedtransversely in the I claim and desire to secure by 'Letters Pat-l boxdischargesthe Gangue matter, and Vdeposits the gold or otherVmetalliierous values into the storage trap of the gravity' trap4boxes.`

The gravitytrap box may be revolved on its pivot 2 for cleaning uppurposes. When in operation it isl checked and held in place by theseries of stop guides 11. and roller arms l2 projecting from the sideofthe box.

The Wire precipitators l0, as shown in.

Fig. 2, prevent the compactingof the material distributed. into theboxes,l and help precipitateithe gold carried therein.

v Having thus described my invention, what ent isl.' In a concentrator,a box, a series of spaced U-shaped ritiles 'having theirV bases securedto the box bottom, one of the sides of the riies'being extendedoutwardly and.`

thenvu'pwardly to form upper L-shaped partsl which extend toward thecenter of the box,

and staples in the-box bottom `some of which underlie the L-shaped partsof the ritils.;

2. In a concentrator, a.fra1ne,a box mounted. iinl 'the' frame in spacedrelation'f t0 the sides thereof, lexible standards connected to theframe and to the center of the box for pivotally. supportingl thelatter, means -to I novablyl and adjustably engage the ends of the boxto permit the .latter tol be set at varyinginclinations by movingthe ibox about its pivotal points, and means connected to one of thestandards for reciprocating same.`

In a concentrator, a mounted in the frame in spaced relation to thesides thereof, iiexible standards connect-1 ed to the frame at their`lower ends andA to the center of the box at their upper ends so i as toallow the box to be tilted at its ends with respect to the standards andabout `its l 60 the standards, and means to slidably engage: the boxends upon the angle of inclination pivotal points, means to yreciprocateone ofof same being. varied.I

el. In a concentrator, a frame, a box in the frame spaced therefrom,means to movably support the box to allow same to be adjustably tiltedor inclined relative to the sup-i ort means to^reci rocate the boxand:

means to movably support'the box in its ad-i justed` inclined position.

In testimonywhereof I have hereunto sat1 my hand in the presence oftwosubscribing witnesses.

l DAVID F. PLA'INER.

Witnesses F. W. Sanering, R. I-I. WILLEY.

Copies of this patent. may be obtained for Vfive cents each, byaddressing the Commissonerof Patientin.` Washington, D. C.

